<?hh
/**
 * Copyright (c) 2014, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the "hack" directory of this source tree.
 *
 *
 */

function blah(?int $x): void {
  if ($x !== null) {
    do {
      $x += 5;
      $x = null;
    } while ($x > 5);
  }
}
